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task-3-2-2-text-classification/main.py
2026-04-30 15:53:27 +08:00

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import numpy as np
from dataset import load_data, BoWVectorizer, TFIDFVectorizer
from train import train
import config as cfg
import pickle
import time
# <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
texts, labels = load_data()
labels = np.array(labels)
# <20><><EFBFBD><EFBFBD>ѵ<EFBFBD><D1B5><EFBFBD><EFBFBD>/<2F><><EFBFBD>Լ<EFBFBD>
np.random.seed(42)
indices = np.random.permutation(len(texts))
split = int(0.8 * len(texts))
train_idx, test_idx = indices[:split], indices[split:]
train_texts = [texts[i] for i in train_idx]
test_texts = [texts[i] for i in test_idx]
y_train, y_test = labels[train_idx], labels[test_idx]
# <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
if cfg.VECTORIZER_TYPE == "bow":
vec = BoWVectorizer(cfg.MAX_FEATURES)
else:
vec = TFIDFVectorizer(cfg.MAX_FEATURES)
vec.fit(train_texts)
X_train = np.array([vec.transform(t) for t in train_texts])
X_test = np.array([vec.transform(t) for t in test_texts])
# ѵ<><D1B5>
print("="*50)
print(f"ѵ<EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>:\n ģ<><C4A3>: {cfg.MODEL_TYPE}\n <20><><EFBFBD><EFBFBD>: {cfg.VECTORIZER_TYPE}\n ѧϰ<D1A7><CFB0>: {cfg.LEARNING_RATE}")
print("="*50)
model, t = train(
X_train, y_train, X_test, y_test,
model_type=cfg.MODEL_TYPE,
lr=cfg.LEARNING_RATE,
epochs=cfg.NUM_EPOCHS,
use_weight=cfg.USE_CLASS_WEIGHT
)
# <20><><EFBFBD><EFBFBD>
ts = time.strftime("%m%d_%H%M%S")
name = f"model_{cfg.MODEL_TYPE}_{cfg.VECTORIZER_TYPE}_{'weighted' if cfg.USE_CLASS_WEIGHT else 'raw'}_{ts}"
if cfg.MODEL_TYPE == "lr":
np.save(f"{name}_W.npy", model.W)
np.save(f"{name}_b.npy", model.b)
else:
np.save(f"{name}_W1.npy", model.W1)
np.save(f"{name}_b1.npy", model.b1)
np.save(f"{name}_W2.npy", model.W2)
np.save(f"{name}_b2.npy", model.b2)
with open(f"{name}_vec.pkl", "wb") as f:
pickle.dump(vec, f)
print(f"\nģ<EFBFBD><EFBFBD><EFBFBD>ѱ<EFBFBD><EFBFBD><EFBFBD>: {name}_*.npy/*.pkl")